Hi all, Today we checked in a patch that standardizes Zookeeper data to use JSON format (KAFKA-755<https://issues.apache.org/jira/browse/KAFKA-755>). If you plan to rebase or clone to use the HEAD of 0.8 branch, your next build will have changes to the way Zk data is read and written. This data includes replica assignment, brokers' and controller's information, and consumer subscriptions.
For working off of 0.8 HEAD, you need to : 1. Stop ZK, Kafka brokers and all console consumers 2. Wipe out all ZK data and kafka log data 3. Upgrade kafka brokers and all console consumers to HEAD and restart them Thanks, Swapnil